Breaking Dawn

Randall first appears in Breaking Dawn to help testify against the Volturi for the Cullens. Emmett and Rosalie tracked him down and sent him to Forks without giving him much details other than their family needing his help.

While on his way to Forks, he befriends another nomadic vampire named Mary, who is also on her way to the Cullens. As soon as he heard their story about Bella and Edward's daughter, Renesmee, being mistaken for an immortal child, he agrees to stay and witness for the Cullens.

When Alistair left out of fear of the Volturi, Randall and Mary declare themselves to stay and help no matter the risk. When Jacob speaks on the wolves' behalf, Randall and Peter refer to them as "children" and "infants".

Randall happily leaves the Cullens after the Volturi retreated in peace.

Physical appearance

Randall's appearance was never exploited in the books other than that he was changed at age 18. In the movie, he is dark blond and has a mustache, and physically older than 18.